| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2014 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #ifndef __SYMBOLS_H |
| #define __SYMBOLS_H |
| |
| #include <types.h> |
| |
| extern u8 _dram[]; |
| |
| #define REGION_SIZE(name) (_e##name - _##name) |
| |
| #define DECLARE_REGION(name) \ |
| extern u8 _##name[]; \ |
| extern u8 _e##name[]; |
| |
| DECLARE_REGION(sram) |
| DECLARE_REGION(timestamp) |
| DECLARE_REGION(preram_cbmem_console) |
| DECLARE_REGION(cbmem_init_hooks) |
| DECLARE_REGION(stack) |
| DECLARE_REGION(preram_cbfs_cache) |
| DECLARE_REGION(postram_cbfs_cache) |
| DECLARE_REGION(cbfs_cache) |
| DECLARE_REGION(payload) |
| |
| /* "program" always refers to the current execution unit. */ |
| DECLARE_REGION(program) |
| /* _<stage>_size is always the maximum amount allocated in memlayout, whereas |
| _program_size gives the actual memory footprint *used* by current stage. */ |
| DECLARE_REGION(decompressor) |
| DECLARE_REGION(bootblock) |
| DECLARE_REGION(verstage) |
| DECLARE_REGION(romstage) |
| DECLARE_REGION(postcar) |
| DECLARE_REGION(ramstage) |
| |
| /* Arch-specific, move to <arch/symbols.h> if they become too many. */ |
| |
| DECLARE_REGION(pagetables) |
| DECLARE_REGION(ttb) |
| DECLARE_REGION(ttb_subtables) |
| DECLARE_REGION(dma_coherent) |
| DECLARE_REGION(soc_registers) |
| DECLARE_REGION(framebuffer) |
| DECLARE_REGION(pdpt) |
| DECLARE_REGION(opensbi) |
| DECLARE_REGION(bl31) |
| |
| /* |
| * Put this into a .c file accessing a linker script region to mark that region |
| * as "optional". If it is defined in memlayout.ld (or anywhere else), the |
| * values from that definition will be used. If not, start, end and size will |
| * all evaluate to 0. (We can't explicitly assign the symbols to 0 in the |
| * assembly due to https://sourceware.org/bugzilla/show_bug.cgi?id=1038.) |
| */ |
| #define DECLARE_OPTIONAL_REGION(name) asm (".weak _" #name ", _e" #name) |
| |
| /* Returns true when pre-RAM symbols are known to the linker. |
| * (Does not necessarily mean that the memory is accessible.) */ |
| static inline int preram_symbols_available(void) |
| { |
| return !CONFIG(ARCH_X86) || ENV_ROMSTAGE_OR_BEFORE; |
| } |
| |
| #endif /* __SYMBOLS_H */ |
